CN109047274A - A kind of method for innocent treatment of the useless carbon slag of aluminium electroloysis - Google Patents
A kind of method for innocent treatment of the useless carbon slag of aluminium electroloysis Download PDFInfo
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- CN109047274A CN109047274A CN201810798074.2A CN201810798074A CN109047274A CN 109047274 A CN109047274 A CN 109047274A CN 201810798074 A CN201810798074 A CN 201810798074A CN 109047274 A CN109047274 A CN 109047274A
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- slag
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 56
- 239000002893 slag Substances 0.000 title claims abstract description 53
- 239000004411 aluminium Substances 0.000 title claims abstract description 50
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 37
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 82
- 229910052799 carbon Inorganic materials 0.000 title claims description 66
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000000126 substance Substances 0.000 claims abstract description 31
- 229910052742 iron Inorganic materials 0.000 claims abstract description 25
- 230000009467 reduction Effects 0.000 claims abstract description 17
- 238000002844 melting Methods 0.000 claims abstract description 15
- 230000008018 melting Effects 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 14
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 7
- 239000003610 charcoal Substances 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 19
- 239000002699 waste material Substances 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 239000000654 additive Substances 0.000 claims description 13
- 230000000996 additive effect Effects 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 7
- 239000003792 electrolyte Substances 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 239000004566 building material Substances 0.000 claims description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 24
- 230000008901 benefit Effects 0.000 abstract description 15
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 238000003672 processing method Methods 0.000 abstract description 3
- 150000002506 iron compounds Chemical class 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract description 2
- 239000002920 hazardous waste Substances 0.000 abstract 1
- 231100000614 poison Toxicity 0.000 abstract 1
- 230000007096 poisonous effect Effects 0.000 abstract 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 9
- 238000005868 electrolysis reaction Methods 0.000 description 9
- 229960005363 aluminium oxide Drugs 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 3
- 101000993059 Homo sapiens Hereditary hemochromatosis protein Proteins 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- NROKBHXJSPEDAR-UHFFFAOYSA-M potassium fluoride Chemical compound [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 description 1
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminum fluoride Inorganic materials F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical group [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229930013930 alkaloid Natural products 0.000 description 1
- 150000003797 alkaloid derivatives Chemical class 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011294 coal tar pitch Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 239000006184 cosolvent Chemical group 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005008 domestic process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000003682 fluorination reaction Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 description 1
- 229910001635 magnesium fluoride Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 239000006253 pitch coke Substances 0.000 description 1
- 235000003270 potassium fluoride Nutrition 0.000 description 1
- 239000011698 potassium fluoride Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 235000013024 sodium fluoride Nutrition 0.000 description 1
- 239000011775 sodium fluoride Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of method for innocent treatment for the useless carbonizable substance that aluminium electroloysis generates, and carry out melting to the useless carbonizable substance that aluminium electroloysis generates using red mud and/or iron ore, generate cast iron and innoxious slag；Include the following steps: (1) break process；(2) it mixes；(3) reduction melting.The method for innocent treatment for the useless carbonizable substance that a kind of aluminium electroloysis of the present invention generates, it is mixed by the useless carbonizable substance for generating aluminium electroloysis with the high iron compound for preparing aluminium oxide generation, harmless treatment is carried out through high temperature reduction, the processing method realizes the rational utilization of resource, produces huge economic benefit；On the other hand, poisonous and hazardous waste is subjected to innocuously transformation, solves problem of environmental pollution, has saved huge offal treatment cost, produced huge economic benefit and social benefit.
Description
Technical field
The present invention relates to recovery and recycling of used resources technical fields, more particularly to a kind of the innoxious of the useless carbon slag of aluminium electroloysis
Processing method.
Background technique
Basic raw material one of of the aluminium as the national economic development, using very extensive.Aluminium is usually to use ice crystal-
The production of alumina molten salt electrolysis method, in the process, using molten cryolitic as molten matter, using aluminium oxide as molten matter, with carbon
Ferritic is as anode, using molten aluminum as cathode, by the effect of direct current, reacts the aluminium oxide in electrolyte with carbon, generates
Aluminium and carbon dioxide.
Pre-baked anode carbon blocks be using petroleum coke, pitch coke as aggregate, coal tar pitch be binder through calcining, ingredient, kneading, at
The carbon block produced after shape, roasting technique, makees the anode material of pre-calcining electrolytic cell.This carbon block has steady after roasting
Fixed geometry, and make the anode of aluminium cell, therefore claim pre-baked anode carbon blocks, traditionally carbon anode also known as used for aluminium electrolysis.In advance
Roasting anode carbon block is the important component of prebaked cell for aluminum-reduction, the main function in aluminium electrolysis process are as follows: is participated in
Electrochemical reaction in aluminium electrolysis process simultaneously imports DC current in electrolytic cell；Maintain the thermal balance in aluminium electrolysis process；Dimension
The relatively stable and balance for holding electromagnetic field in aluminium electrolysis process, makes homogeneous current distribution as possible.
But the factors such as unstable of each technical conditions in the quality of production and aluminium electrolysis process of carbon anode, so that aluminium electroloysis
There is situations such as part is scaling-off, falls off and enters in electrolyte in carbon anode in journey, influences the good operation of aluminium cell.For this purpose,
During aluminium electroloysis, salvaging to the breeze in aluminum cell electrolyte periodically or non-periodically is needed, or more
During changing anode and out aluminium, the breeze in aluminum cell electrolyte is salvaged.
Under normal circumstances, carbon slag caused by aluminium per ton is about 10~30kg, and China is Aluminum Electrolysis Production big country of the world,
China's electrolytic aluminium yield in 2017 is 33,290,000 tons, accounts for about the 55% of world's electrolytic aluminium total output, produce per year the charcoal quantity of slag be about 333~
1000 tons.It is carbon, ice crystal, sodium fluoride, aluminum fluoride, fluorination that the breeze main chemical compositions come are salvaged from aluminium cell
Calcium, magnesium fluoride, lithium fluoride, potassium fluoride and aluminium oxide etc..
These contain the carbon slag of fluoride, and the useless charcoal cathode and carbon residue anode of aluminium cell mostly use nature heap at present
It the processing modes such as puts, bury, environment and underground water being generated seriously polluted, also causing the waste of resource.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of method for innocent treatment of the useless carbon slag of aluminium electroloysis, can solve
Certainly existing aluminium electroloysis give up breeze there are the problem of.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: a kind of giving up for aluminium electroloysis generation is provided
The method for innocent treatment of carbonizable substance carries out melting to useless charcoal substance using red mud and/or iron ore, generates cast iron and innoxious
Slag；Include the following steps:
(1) it is spare that useless charcoal matter utilization crusher break process: is crushed to certain partial size；
(2) it mixes: broken useless charcoal substance and at least one of red mud or iron ore ratio by weight is uniformly mixed；
(3) reduction melting: mixed material obtained in step (2) is placed in metallurgical furnace, through reduction melting, obtains cast iron and nothing
The slag of evilization, the slag is as production cement or the raw material of building materials.
In a preferred embodiment of the present invention, in the step (1), the partial size is 500 μm~25cm.
In a preferred embodiment of the present invention, in the step (2), useless charcoal substance is mixed with red mud, and described useless
The weight ratio of charcoal substance and red mud is 1:3~1:30, wherein Fe in the red mud2O3Content be 25~80wt%.
In a preferred embodiment of the present invention, in the step (2), useless charcoal substance is mixed with iron ore, and described
The weight ratio of useless charcoal substance and iron ore is 1:6~1:20, wherein Fe in the iron ore2O3Content be 40wt% or more.
In a preferred embodiment of the present invention, in the step (2), by the mixing of useless charcoal substance and red mud and iron ore
Object mixing, and the weight ratio of the mixture of the useless charcoal substance and red mud and iron ore is 1:7~1:25, wherein the red mud
With Fe in the mixture of iron ore2O3Content be 35~80%.
In a preferred embodiment of the present invention, the useless charcoal substance is the useless carbon slag or useless carbon slag and useless yin in electrolyte
The mixture of pole carbon block and/or carbon residue anode.
In a preferred embodiment of the present invention, in the mixture of the useless carbon slag and waste cathode carbon block or carbon residue anode,
The additive amount of waste cathode carbon block or carbon residue anode is less than the 5wt% of the useless carbon slag additive amount.
In a preferred embodiment of the present invention, in the mixture of the useless carbon slag and waste cathode carbon block and carbon residue anode,
The additive amount of the mixture of waste cathode carbon block and carbon residue anode is less than the 5wt% of the useless carbon slag additive amount.
In a preferred embodiment of the present invention, in the step (3), the process conditions of the reduction melting are as follows: temperature
1950~2000 DEG C, the time is 3~5h.
In a preferred embodiment of the present invention, in the step (3), the metallurgical furnace includes blast furnace, shaft furnace, revolution
Kiln, continuous tunnel furnace or and reduction furnace.
The beneficial effects of the present invention are: the method for innocent treatment for the useless carbonizable substance that a kind of aluminium electroloysis of the present invention generates, leads to
It crosses and mixes the useless carbonizable substance that aluminium electroloysis generates with the high iron compound for preparing aluminium oxide generation, carried out through high temperature reduction innoxious
Processing, the processing method realize the rational utilization of resource, produce huge economic benefit；On the other hand, have toxic
Harmful waste carries out innocuously transformation, solves problem of environmental pollution, has saved huge offal treatment cost, produced
Huge economic benefit and social benefit；The present invention realizes the comprehensive utilization of the environmental protection of low cost, energy conservation and waste, before market
Scape is wide.
Detailed description of the invention
Fig. 1 is the technique of one preferred embodiment of method for innocent treatment for the useless carbonizable substance that a kind of aluminium electroloysis of the present invention generates
Flow diagram.
Specific embodiment
The preferred embodiments of the present invention will be described in detail below so that advantages and features of the invention can be easier to by
It will be appreciated by those skilled in the art that so as to make a clearer definition of the protection scope of the present invention.
The embodiment of the present invention includes:
Present invention discloses a kind of method for innocent treatment for the useless carbonizable substance that aluminium electroloysis generates, with aluminium cell production process
The fluoride of middle generation and the useless carbon slag of aluminium oxide (can also add a certain number of aluminium electrolytic charcoal cathodes or carbon residue sun
Pole), according to certain granularity requirements, after crushing, with the high Fe content that is generated in a certain number of aluminum oxide production process
Red mud, iron ore or red mud are uniformly mixed with the mixture of iron ore, reduction melting are passed through in metallurgical reduction furnace, in the reduction
Carbon containing object during melting reaction, in useless carbon slag (a certain number of aluminium electrolytic charcoal cathodes or carbon residue anode can also be added)
Matter fluoride, aluminium oxide in carbon slag and as fluxing agent (it is total to account for about each material containing alkaloid substance in red mud as reducing agent
1~16wt% of amount), the metal oxide in red mud and/or iron ore, mainly iron oxide is as oxidant, at high temperature
Reason, so that metal oxide is oxidized into corresponding metal, wherein predominantly the higher cast iron of content, carbonaceous material are reduced
It is discharged for carbon dioxide or carbon monoxide, cosolvent and other substances form innoxious melting salt oxidation object melt, i.e., harmless
The slag of change, these innoxious slags can be mixed with red mud or harmless Pot Lining material, be made new refractory material and
The building materials such as brickmaking can also be used as the raw material etc. of production cement.
Embodiment 1
(1) break process: being crushed to 500 μm~25cm of partial size using crusher for useless carbon slag, spare；
(2) it mixes: broken useless carbon slag being mixed with red mud by the weight ratio of 1:3~1:30, Fe in red mud2O3Content be
25~80wt%；
(3) reduction melting: by mixed material obtained in step (2) be placed in metallurgical furnace in, 1950~2000 DEG C at a temperature of
Through 3~5h of reduction melting, cast iron and innoxious slag are obtained, obtained innoxious slag can be used as the original of production cement
Material can also be used as the raw material of production construction material, such as refractory material, brick.
Wherein, metallurgical furnace used includes blast furnace, shaft furnace, rotary kiln or continuous tunnel furnace and reduction furnace.
Embodiment 2
The difference from embodiment 1 is that broken useless carbon slag is individually pressed 1:6~1:20 with iron ore in the step (2)
Weight ratio mixing, Fe in iron ore2O3Content be 40wt% or more.
Embodiment 3
The difference from embodiment 1 is that in the step (2), by the mixture of broken useless carbon slag and red mud and iron ore
It is mixed by the weight ratio of 1:7~1:25, Fe in the mixture of the red mud and iron ore2O3Content be 35~80%.
Embodiment 4
Difference with embodiment 1-3 is, waste cathode carbon block, and the additive amount of waste cathode carbon block are also added in the useless carbon slag
Less than the 5wt% of the useless carbon slag additive amount.
Embodiment 5
Difference with embodiment 1-3 is, carbon residue anode is also added in the useless carbon slag, and the additive amount of carbon residue anode is less than
The 5wt% of the useless carbon slag additive amount.
Embodiment 6
Difference with embodiment 1-3 is, the mixture of waste cathode carbon block and carbon residue anode is also added in the useless carbon slag, and
The additive amount of the mixture of waste cathode carbon block and carbon residue anode is less than the 5wt% of the useless carbon slag additive amount.
Currently, the useless breeze cost generated in domestic process aluminum electrolytic slot production process, in 1000 yuan/t or so, country is right
Solid waste Pollutant discharge levy criterion is 1000 yuan/t, country landfill 2200 yuan/t of cost.
By taking a yield is 1,000,000 tons/year of electrolytic aluminium factory as an example, at least producible economic benefit are as follows:
1. the aluminium electrolysis process middle age generates useless breeze at 1~30,000 tons, average to calculate according to generating 20,000 tons of breezes year, then national right
Solid waste pollution charge is 20,000,000 yuan, and 44,000,000 yuan of landfill disposal cost, two add up to 64,000,000 yuan of need；Use this hair
Bright, year can save ten thousand yuan.
2. about 2,000,000 tons of red mud can be handled year using the present invention, 2.0 hundred million yuan of charges for disposing pollutants are saved, saves red mud processing dimension year
About 1.0 hundred million yuan of cost of shield；I.e. whole year can save 3.0 hundred million yuan.
3. about 100,000 tons of the pig iron can be recycled in year, because having handled high Fe content red mud and iron ore etc. with the pig iron 1200 per ton
Member calculates, and year creates 1.2 hundred million yuan of economic benefit.
4. the harmless slag that generates of the present invention can produce cement, refractory material and building materials etc., the economic benefit of generation nor
Chang Xianzhu.
To sum up, if the processing for the useless breeze that national Aluminium Industry generates is using the present invention, economic benefit is created at least in year
In 16,900,000,000 yuan of great economic benefit；Solve the useless breeze and red mud generated in aluminium cell production process at the same time
Pollution problem, solves global problem, and social benefit is very significant.
The problem of the useless breeze generated in aluminium cell production process has not only been effectively treated in this method, while also handling
A part of high Fe content red mud problem, at the same solve process aluminum electrolytic slot give up generate in breeze and aluminum oxide production process it is red
Two big world problem of mud, not only solves problem of environmental pollution, and effectively converts the harmless of treasured for two big useless noxious materials
Change processing realizes the comprehensive utilization of environmental protection, the energy conservation and waste of low cost, has huge economic benefit and significant society
Benefit.
In the description of the present invention, it should be noted that the instruction such as term " on ", "lower", "left", "right", "inner", "outside"
Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings or the invention product using when usually put
Orientation or positional relationship, be merely for convenience of description of the present invention and simplification of the description, rather than the device of indication or suggestion meaning
Or element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, and comes for those skilled in the art
It says, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any modification, equivalent
Replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of method for innocent treatment for the useless carbonizable substance that aluminium electroloysis generates, which is characterized in that utilize red mud and/or iron ore
Melting is carried out with useless charcoal substance, generates cast iron and innoxious slag；Include the following steps:
(1) it is spare that useless charcoal matter utilization crusher break process: is crushed to certain partial size；
(2) it mixes: broken useless charcoal substance and at least one of red mud or iron ore ratio by weight is uniformly mixed；
(3) reduction melting: mixed material obtained in step (2) is placed in metallurgical furnace, through reduction melting, obtains cast iron and nothing
The slag of evilization, the slag is as production cement or the raw material of building materials.
The method for innocent treatment of carbon slag 2. aluminium electroloysis according to claim 1 is given up, which is characterized in that the step (1)
In, the partial size is 500 μm~25cm.
The method for innocent treatment of carbon slag 3. aluminium electroloysis according to claim 1 is given up, which is characterized in that the step (2)
In, useless charcoal substance is mixed with red mud, and the weight ratio of the useless charcoal substance and red mud is 1:3~1:30, wherein the red mud
Middle Fe2O3Content be 25~80wt%.
The method for innocent treatment of carbon slag 4. aluminium electroloysis according to claim 1 is given up, which is characterized in that the step (2)
In, useless charcoal substance is mixed with iron ore, and the weight ratio of the useless charcoal substance and iron ore is 1:6~1:20, wherein described
Fe in iron ore2O3Content be 40wt% or more.
The method for innocent treatment of carbon slag 5. aluminium electroloysis according to claim 1 is given up, which is characterized in that the step (2)
In, useless charcoal substance is mixed with the mixture of red mud and iron ore, and the mixture of useless the charcoal substance and red mud and iron ore
Weight ratio be 1:7~1:25, wherein Fe in the mixture of the red mud and iron ore2O3Content be 35~80%.
The method for innocent treatment of carbon slag 6. aluminium electroloysis according to claim 1-5 is given up, which is characterized in that described
Useless charcoal substance is the mixture of the useless carbon slag or useless carbon slag and waste cathode carbon block and/or carbon residue anode in electrolyte.
7. aluminium electroloysis according to claim 6 give up carbon slag method for innocent treatment, which is characterized in that the useless carbon slag with
In the mixture of waste cathode carbon block or carbon residue anode, the additive amount of waste cathode carbon block or carbon residue anode is less than the useless carbon slag addition
The 5wt% of amount.
8. aluminium electroloysis according to claim 6 give up carbon slag method for innocent treatment, which is characterized in that the useless carbon slag with
In the mixture of waste cathode carbon block and carbon residue anode, the additive amount of the mixture of waste cathode carbon block and carbon residue anode is less than described useless
The 5wt% of carbon slag additive amount.
The method for innocent treatment of carbon slag 9. aluminium electroloysis according to claim 1 is given up, which is characterized in that the step (3)
In, the process conditions of the reduction melting are as follows: 1950~2000 DEG C of temperature, the time is 3~5h.
The method for innocent treatment of carbon slag 10. aluminium electroloysis according to claim 1 is given up, which is characterized in that the step (3)
In, the metallurgical furnace includes blast furnace, shaft furnace, rotary kiln, continuous tunnel furnace or and reduction furnace.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109759423A (en) * | 2019-02-01 | 2019-05-17 | 河南科技大学 | A kind of method of comprehensive utilization of carbon slag in Aluminium electrolysis |
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| JPS5480310A (en) * | 1977-12-09 | 1979-06-27 | Nippon Keikinzoku Sougou Kenki | Production of red mud sintered body |
| CN1120822A (en) * | 1993-04-06 | 1996-04-17 | 奥斯麦特有限公司 | Smelting of carbon-containing material |
| CN101275182A (en) * | 2008-04-30 | 2008-10-01 | 武汉科技大学 | Comprehensive utilization method for red mud |
| CN201933128U (en) * | 2010-11-29 | 2011-08-17 | 董亚飞 | Equipment for removing red-mud separated iron, aluminum-silicon slag and alkali metal |
| CN108994051A (en) * | 2018-07-23 | 2018-12-14 | 江苏中商碳素研究院有限公司 | The treatment process of waste material in aluminium cell |
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| CN109759423A (en) * | 2019-02-01 | 2019-05-17 | 河南科技大学 | A kind of method of comprehensive utilization of carbon slag in Aluminium electrolysis |
| CN109759423B (en) * | 2019-02-01 | 2020-08-18 | 河南科技大学 | Comprehensive utilization method of aluminum electrolysis carbon slag |
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Application publication date: 20181221 |